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M4 Slough-Maidenhead By-pass (Junctions 5 to 7)

Buckinghamshire County Council (County Surveyor E H Frankland) was the agent for the Ministry of Transport for the design and supervision of construction of this five and a quarter mile length of the M4. The contractors Higgs and Hill Ltd and Richard Costain (Civil Engineering) Ltd formed a Joint Venture for the project which also included a half mile long dual carriageway all-purpose road and 5 and a half miles of side road diversions. The dual two-lane motorway was opened to traffic in March 1963.

Widening to dual three-lane was completed in October 1971 by Amey Asphalt with the Eastern Road Construction Unit (Bucks Sub-Unit) as the Engineer.